Did we have rolling blackouts from electricity shortages during the energy crisis? No.

Was the electricity extremely expensive? Yes.

Reliable electricity has a certain worth. And that is vastly lower than what nuclear power needs when running at 100% 24/7 all year around.

And that is disregarding that EDF is already crying about renewables crater the earning potential of their existing nuclear fleet due to load following and increased maintenance costs. Let alone horrifyingly expensive new builds.